Configuration Bug Einsy

Hello, I tried to configure an old Einsy board for Klipper. I've done the bootloader stuff, and it worked out.
Upon starting the Ratos Configuration, the first issue, though a minor one, was Ratos not being able to query the board successfully, but since the usb-connection is known to work, and you can skip this, I didnt give it much thought.
During the printer configuration, I specced a basically standard mk3, except for a triangle labs bmg 3:1 extruder. For the part cooling and hotend fans I chose Input voltage pwm. When I wanted to complete the setup, it threw an error, that i can't circumvent.

Changing the board settings to digital pwm for testing did nothing. It's worth mentioning, that I also got an error, when I tried to set X and Y Accelerometer to "none", however switching to host connected accelerometer solved that issue for now. I did WinSCP into the pi to see if the Pins are specced in the configfile, and there was a set pin for the fan.
I have no clue how to resolve this, and it won't let me proceed.